Sectional mold



(No Model.) 2 Sheets-Sheet; 2. F. A. MEYER.

SEGTIONAL MOLD.

No. 415,251. Patented Nov. 19, 1889.

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'NITED STATES PATENT OFFICE.

FREDERICK A. MEYER, OF BROOKLYN, NE\V YORK, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE COMPOSITE CELL COMPANY, OF NEW JERSEY.

SECTIONAL MOLD.

SPECIFICATION forming part of Letters Patent No. 415,251, dated November 19, 1889.

Application filed November 11, 1887. Serial No. 254,897- (No model.)

To aZZ whom it may concern: mold in place. The plastic compound is Be it known that I, FREDERICK A. MEYER, poured in between the inner and outer molds, a citizen of the United States, residing at and when cooled the parts of the inner mold Brooklyn, in the county of Kings and State are loosened by unscrewing the rod holding of New York, have invented certain new and the cover on. The posit-ion of the mold is re- 55 useful Improvements in Sectional Molds, of versed and the sides permitted to collapse, which the following is a specification, refer after which the cover, which now lies in the ence being had to the drawings accompanybottom of the article cast, is withdrawn. This ing and forming a part of the same. general plan of construction and operation This invention is an improvement in molds will be explained in detail by reference to 60 for casting those plastic compounds which the accompanying drawings. shrink or contract in cooling; and it is more Figure 1 is a vertical central section of the particularly designed for use with a compomold set up and ready for use. Fig. 1 is an sition of matter discovered by me and deenlarged sectional view of the junction bescribed in an application of even date heretween the side walls and the base of the 65 with. This composition contains sulphur, mold. Fig. 1 is a similar view of the juncone hundred parts; a comminuted or finelytion between the cover and one of the walls divided mineralsuch as silicious sand0ne of the inner mold. Fig. 2 is a plan View of hundred and fifty parts; a fibrous material the two molds with the cover of the inner such as asbestusfifty parts, and paraffine mold removed. Fig. 3 is a vertical section of 70 or similar wax, three to fifteen parts. The the molds as placed in removing the casting. proportions and the ingredients may be some- F g- 4: is a Similar View showing the Side what varied, still preserving the general walls of the inner mold collapsed. characteristics of the materials; but such The drawings illustrate a mold for casting compounds containing sulphur are difticult rectangular boxes or cases, suitable for bat- 75 to mold or cast on account of the great shrinkt-ery jars or cells; but the principle of conage or contraction of the sulphur on cooling struction would be the same in molds for in the mold. In order to overcome this and casting other receptacles of a like nature. to secure a mold from which the castingmay A is a base-board, and B B are the four side 3 be readily and quickly withdrawn, I employ walls or plates, the material for them and So a sectional collapsible mold. These devices other plates of the mold being of wood or are not broadly new; but the construction of metal or the like. my improvementdistinguishes it from others C C are corner-posts, triangular in crossheretofore used, and renders it particularly section. The vertical edges of the side plates serviceable for casting the new compound B B are beveled off, as shown, so that when 85 described. they are fitted with the corner-posts a rect- In carrying out my invention I may use angular box is formed with an even exterior any convenient form of outer mold; but I surface. prefer to secure together the four sides by The upper and lower edges or ends of the 40 temporary fastenings, and to place them on parts B C composing the inner mold have a 0 a base provided with suitably-located indennumber of projecting pins or lugs D D. In tations, into which project pins or projecthe base A are corresponding indentations, tions on the edges of the side plates. As the into which the said lugs fit when the mold inner mold I employ a box made up of four is set up. This prevents the parts of the independent sides and four triangular cormold from sliding together. 95 her-pieces. All of these are provided with E is a cover, or, to speak more correctly, pins or lugs, which fit into corresponding dethe bottom of the inner mold. It is of slightly pressions in the base. There is acover which smaller dimensions than the box to which it is placed over the inner mold and clamped is applied, so that when in position it leaves to the base to hold the parts of the inner a shoulder a around the bottom of the inner I00 readily removed.

mold, as illustrated in Fig. 1. Along the edge of the cover E are indentations, into which lugs in the sides and corner-pieces B C fit. Of course in this and in other parts of the apparatus it is largely a matter of preference whether the lugs are on the sides and the corresponding indentations in the cover and base or conversely.

F is a metal rod securely fastened to the in ner side of the cover E and extending down through the base A. When the parts of the inner mold are put together, the cover E and base A are drawn tightly together by a screw-n ut G on this rod. An outer box or mold composed of the side pieces H, temporarily secured together by fastenings K at the corner, or by any other convenient means, is placed over the inner mold. The lower edges of the sides H have also lugs which fit into corresponding holes in the base A, and so maintain the two molds in proper relative positions, as is shown in Fig. 1 The mold is then set on a suitable bench or table in the position shown in Fig. 1, and the fluid compound poured into the space between the two molds, or rather parts of the mold, until the outer part is filled to a sufficient extent above the other to form a bottom of the proper thickness. The mold is then reversed, as in Fig. 3, and the base A removed by the removal of the nut G. The sides B will then be free to swing into the open space in the mold, as in Fig. 4, so that both they and the corner-pieces C may be The cover E, which is now the bottom of the inner mold, being of smaller dimensions than the inside of the casting and its edges rounded off, as shown, may be also readilylifted out of the casting, after which the outer Walls of the mold are unfastened and taken oft.

This mold, while of very simple construction, is extremely effective and economical, the difficulties usually encountered in separating castings of plastic materials of the kind herein described from their molds being entirely avoided.

What I claim is- 1. A sectional box-mold composed of the sides and corner-pieces, the edges of the sides contiguous to the corner-pieces being beveled, so as to permit said sides to collapse, with a cover and a base and a clamp for binding the parts together, incombination with an outer box or mold, as set forth.

2. The combination of the base A, the triangular corner-pieces O, the sides B, having their edges beveled, so as to be capable of collapsing, the cover E, and binding or clamping bar F, together forming an inner box or mold, the parts of which are secured against movement by lugs on the edges of the sides which fit into corresponding holes in the other parts, or conversely, with an outer sectional box or mold, as set forth.

3. In a sectional and collapsible mold, the combination, with the sides of the inner mold, of a cover of smaller dimensions than the top of the mold, and provided with lugs fitting into holes in the edges of the sides, as herein set forth.

FREDERICK A. MEYER.

Vitnesses:

RoBT. F. GAYLoRD, FRANK B. MURPHY. 

